openstack-horizon-plugin-freezer-ui from Cloud:OpenStack:Wallaby project
Select Your Operating System
Add repository and install manually
For 15.3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/Cloud:OpenStack:Wallaby/15.3/Cloud:OpenStack:Wallaby.repo zypper refresh zypper install openstack-horizon-plugin-freezer-ui